You can strike at enemy spellcasters who fail to cast defensively when you threaten them.
Prerequisites: Disruptive, 10th-level fighter.
Benefit: Enemies in your threatened area that fail their checks to cast spells defensively provoke attacks of opportunity from you.
Normal: Enemies that fail to cast spells defensively do not provoke attacks of opportunity.
Endzeitgeist Says: Add insult to injury when foes fail their spellcasting - great!